Answered: In the model plant Arabidopsis…

Human Anatomy & Physiology (11th Edition)

11th Edition

ISBN:9780134580999

Author:Elaine N. Marieb, Katja N. Hoehn

Publisher:Elaine N. Marieb, Katja N. Hoehn

Chapter1: The Human Body: An Orientation

Section: Chapter Questions

Problem 1RQ: The correct sequence of levels forming the structural hierarchy is A. (a) organ, organ system,...

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In the model plant Arabidopsis thaliana, the following
alleles were used in a cross:
T = presence of trichomes t = absence of trichomes
D = tall plants d = dwarf plants
W = waxy cuticle w = nonwaxy
A = presence of purple
anthocyanin pigment
a = absence (white)
The T/t and D/d loci are linked 26 m.u. apart on chromosome 1, whereas the W/w and A/a loci are linked 8 m.u.
apart on chromosome 2.
A pure-breeding double-homozygous recessive trichomeless nonwaxy plant is crossed with another pure-breeding
double-homozygous recessive dwarf white plant.
a. What will be the appearance of the F1?
b. Sketch the chromosomes 1 and 2 of the parents and
the F1, showing the arrangement of the alleles.c. If the F1 is testcrossed, what proportion of the
progeny will have all four recessive phenotypes?

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